[Pidgin] #12859: Updated Bengali (bn) translation

[Pidgin]

#12859: Updated Bengali (bn) translation
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Reporter:  israt_tithi  |        Type:  translation 
  Status:  new          |   Component:  pidgin (gtk)
 Version:  2.7.5        |    Keywords:              
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 Hello,
 Here is the updated file, please commit it.

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Ticket URL: <http://developer.pidgin.im/ticket/12859>
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